Логотип «НЕОЛАНТ»

Digital Decommissioning

Digital Decommissioning is a new software and hardware package that uses digital technology to decommission nuclear facilities efficiently. It is supported by building information modeling (BIM), computer-aided simulation, and virtual reality (VR).

Download Digital Decommissioning Description

Purpose of Digital Decommissioning


Users and Fields of Application

Decommissioning Operators: Comprehensive management of decommissioning processes, cost estimates, scheduling of priorities, liability analyses, and management of radioactive wastes

Operating Firms: Development of design and process solutions to assure a safe implementation of the decommissioning activities at minimum cost

Regulatory and Supervisory Authorities: Compliance checking of decommissioning activities and radioactive waste management within required safety standards

Specialists and Contractors: Assures efficient and safe implementation of decommissioning activities and management of radioactive waste generated


Advantages of the Digital Decommissioning Package


Functional Capabilities

Comprehensive Engineering and Radiation Survey (CERS)

Developing Decommissioning Concepts

Decommissioning Designs

Personnel Training for Decommissioning


Case Study: Kozloduy NPP Decommissioning Project

Facility

The Kozloduy Nuclear Power Plant operates in Bulgaria at the Danube River, some 200 kilometers north of the country's capital of Sofia, and five kilometers east of Kozloduy, the town after which the station is named.

In 1966, the governments of Bulgaria and the former Soviet Union signed an agreement to cooperate on the construction of the Kozloduy plant. Construction began four years later as a joint project of Teploelektroproekt of Moscow and Energoproekt of Sofia.

In 1974, the station began operating with an output 220MWe of electrical power. The Soviet Union and later Russia supplied and handled the nuclear fuel. During the years of 1991 to 2002, the station grew to six power units with a total capacity of 3,760MWe, which covered 45% of country's need for electrical energy.

The Kozloduy plant currently manages two pressurized water reactors, with a total output of 2,000MWe. The older and smaller Units 1 to 4 were shut down by 2007. Units 5 and 6, constructed in 1987 and 1991, are VVER-1000 reactors. As part of a program to extend its life by 30 years, Unit 5 was in 2017 upgraded to a capacity of 1,100MWe. A seventh 1,000 MWe unit may be installed using a reactor from the terminated Belene project, for which Bulgaria paid €600 million.

When Bulgaria candidated for EU membership, it was required to satisfy EU conditions for nuclear plant safety, and so the first four nuclear power units will be decommissioned. The remaining two VVER-1000 reactor units (5 and 6) were successfully upgraded during 2005-2006, and so meet EU safety requirements.

Customer: State Enterprise Radioactive Waste (SE RAW), Republic of Bulgaria

Decommissioning: Russian-German consortium comprising of GC NEOLANT, JSC NIKIMT Atomstroy, NUKEM Technologies GmbH, and EWN GmbH

Period of implementation: 2016-2019

Interesting Facts

Goal

Project 44: Development of an equipment dismantling project in the controlled access areas of Kozloduy nuclear power plant, units 1-4

Fig. 1. As-built 3D model showing Units 1 through 4 of the Kozloduy nuclear power plant
Fig. 1. As-built 3D model showing Units 1 through 4 of the Kozloduy nuclear power plant
Fig. 2. Generating the equipment list for selected equipment on the premises of Unit 2, the Kozloduy NPP
Fig. 2. Generating the equipment list for selected equipment on the premises of Unit 2, the Kozloduy NPP
Fig. 3. Visualizing dose rate measurement points on the 3D model of Units 1 through 4, the Kozloduy NPP
Fig. 3. Visualizing dose rate measurement points on the 3D model of Units 1 through 4, the Kozloduy NPP

Results


Implementation

Stage 1. A radiation survey that included the following tasks in Building 1 and the reactor compartment of Unit 1:

Stage 2. The development of 3D engineering and radiation models:

Stage 3. Development of design documentation for dismantlement of systems and equipment of Building 1 and the reactor compartment of Unit 1

Fig. 4. Results of gamma-scanning an area of the Kozloduy nuclear power plant
Fig. 4. Results of gamma-scanning an area of the Kozloduy nuclear power plant
Fig. 5. Interactive analyses of elevation marks at the Kozloduy NPP
Fig. 5. Interactive analyses of elevation marks at the Kozloduy NPP
Fig. 6. Report of the inspection of the Kozloduy NPP premises
Fig. 6. Report of the inspection of the Kozloduy NPP premises
Fig. 7. Generating process flow charts of equipment dismantling in premises of NPP Kozloduy Unit 1
Fig. 7. Generating process flow charts of equipment dismantling in premises of NPP Kozloduy Unit 1

Learn More about Digital Decommissioning

The experts at NEOLANT are happy to consult with you on any issues surrounding the purchase and use of Digital Decommissioning:

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